HJC R-PHA 31 Open Face Helmet - SF Metallic Blue
HJC R-PHA 31 Open Face Helmet - SF Metallic Blue
(Product No.: BB-107H390.06)
HJC R-PHA 31 Open Face Helmet - SF Metallic Blue

HJC R-PHA 31 Open Face Helmet - SF Metallic Blue

414.00 CHF UVP 479.00 CHF

incl. 8.1% tax excl. Shipping costs

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Description

HJC R-PHA 31 Open Face Helmet - SF Metallic Blue

  • New helmet shell material with carbon aramid fibres, carbon fibres, glass fibres, organic non-woven fabrics and natural linen fibres, as well as with multi-density EPS for improved impact resistance and maximum protection.
  • Tested according to ECE 22.06
  • Visor with extendable wind deflector
  • Foldable sun visor
  • Especially suitable for people who wear glasses
  • Lining and cheek pads are replaceable and washable
  • Optimized for noise level and ventilation in the wind tunnel
  • Prepared for second generation SMART HJC communication system (HJC 50B and 21B)
  • Anti-fog Pinlock included


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HJC Size Chart

HJC Size Chart

HJC offers motorcycle helmets and bicycle helmets with partly different size ranges. The categories are therefore listed separately. Individual models may differ from the general reference chart; product-specific sizing always takes priority.

Motorcycle helmets – general HJC reference chart

Measure the head circumference with a flexible measuring tape around the head. For motorcycle helmets, HJC recommends measuring approximately 2.5 cm above the eyebrows.

Size Head circumference (cm) Hat size Head circumference (inches)
3XS* 50–51 6 1/4 – 6 3/8 19 3/4 – 20 1/8
2XS 52–53 6 1/2 – 6 5/8 20 1/2 – 20 7/8
XS 54–55 6 3/4 – 6 7/8 21 1/4 – 21 5/8
S 55–56 6 7/8 – 7 21 5/8 – 22
M 57–58 7 1/8 – 7 1/4 22 3/8 – 22 7/8
L 58–59 7 1/4 – 7 3/8 22 7/8 – 23 1/4
XL 60–61 7 1/2 – 7 5/8 23 5/8 – 24
2XL 62–63 7 3/4 – 7 7/8 24 3/8 – 24 3/4
3XL 64–65 8 – 8 1/8 25 1/8 – 25 1/2
4XL 66–67 8 1/4 – 8 3/8 26 – 26 3/8
5XL 68–69 8 1/2 – 8 5/8 26 3/4 – 27 1/8

* According to HJC, 3XS is available for the C10 as a youth size.

HJC Y10 – youth sizes

Size Head circumference (cm)
YS 48–49
YM 50–51
YL 52–53

Bicycle helmets – model-specific sizing

HJC Sports size ranges vary between certain model generations, especially for size L. The official model-specific measurements are therefore listed separately.

Model S – head circumference (cm) M – head circumference (cm) L – head circumference (cm)
Atara 51–56 55–59 58–61
Bellus 51–56 55–59 58–61
Bellus 2 51–56 55–59 58–63
Calido 51–56 55–59 58–63
Coban 51–56 55–59 58–63
Crosser 51–56 55–59 58–63
Furion 2.0 51–56 55–59 58–61
Furion 3 51–56 55–59 58–63
Gleo (Kinder / Kids) 49–55 – –
Ibex 2.0 51–56 55–59 58–61
Ibex 3 51–56 55–59 58–63
Route 51–56 55–59 58–63
Valeco 51–56 55–59 58–63
Valeco 2 51–56 55–59 58–61

Safety note: A size chart is a reference only. A helmet must fit firmly and evenly around the head, must not move out of position and should not create problematic pressure points. HJC warns that wearing the wrong helmet size can increase the risk of injury. Always try the helmet on and follow the product-specific fitting and safety instructions.

Updated: 11 August 2026. Basis: official HJC Europe motorcycle helmet size chart and proper-fit guidance, plus official HJC Sports product pages for the bicycle helmet models listed above.